Hi John, I've been reading the API document. As you have notice that i've a node <LOCATE_protein> and it contains for child nodes containing different information. I can extract the node attributes from the <LOCATE_protein> node. Can you suggest what function need to use for checking the presence of specific node I.e. whether child nodes such as <externalannot> , <literature>, <direct_interaction> or <metabolic_interaction> is present/absent. Once I know the node types I can extract the information lying inside the nested node.
Thanks in advance. cheers Gaurav > You are on the right track, just create another nested child loop and look > for the items in there. You didn't say what you want to do when you find > the children, but this will at least allow you to find specific elements > using your technique. > > john > > -----Original Message----- > From: Gaurav Kumar [mailto:[email protected]] > Sent: Monday, March 22, 2010 8:18 PM > To: [email protected] > Subject: Parsing Nested XML tags in Xercers-C > > > Hi, > > I'm new to Xerces-C and not sure of many concepts within this API. I > though to learn this useful API by following tutorials and problems > discussed in the mailing list. > > I'm able to extract attributes of the tag <LOCATE_protein>. This tag > contains nested children. I need to traverse through the XML tree to > fetch > the required information in the nested tags( from child or grandchild > nodes). Can any one suggest any simple function to do that in Xerces-C. > Below > is the sample XML file and modified code > (http://www.yolinux.com/TUTORIALS/XML-Xerces-C.html). > > Thanks in advance > > Cheers > Gaurav > <?xml version="1.0" encoding="UTF-8" standalone="yes"?> > <LOCATE_interaction > xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";> > <LOCATE_protein uid="6000002" uniprot="P27824" refseq=""> > <externalannot> > <source db="HPRD" db_id="00252" > goid="GO:0005764">Lysosomes</source> > <source db="HPRD" db_id="00252" goid="GO:0005635">Nuclear > Envelope</source> > <source db="HPRD" db_id="00252" goid="GO:0005794">Golgi > Apparatus</source> > <source db="HPRD" db_id="00252" > goid="GO:0005783">Endoplasmic Reticulum</source> > <source db="HPRD" db_id="00252" goid="GO:0005886">Plasma > Membrane</source> > <source db="UniProt/SPTrEMBL" db_id="P27824" > goid="GO:0005783">endoplasmic reticulum</source> > <source db="UniProt/SPTrEMBL" db_id="P27824" > goid="GO:0042470">melanosome</source> > </externalannot> > <literature></literature> > <direct_interaction> > <entry source="HPRD" source_id="00252" uniprot="P27824" > refseq="NP_001737.1"> > <name>Calnexin</name> > <interactor type="direct" pubmed_id="8136357"> > <molecule source_id="00127" gene_symbol="IFNGR1" > uniprot="P15260" refseq="">Interferon gamma > receptor 1</molecule> > </interactor> > </direct_interaction> > <metabolic_interaction> > <entry source_id="hsa:55832"> > <gene_name>CAND1</gene_name> > <defination>cullin-associated and > neddylation-dissociated 1</defination> > <orthology></orthology> > <class></class> > <enzyme></enzyme> > </entry> > <entry source_id="ENSG00000111530-MONOMER"></entry> > </metabolic_interaction> > </LOCATE_protein> > .... > .... > ..... > </LOCATE_interaction> > > > > m_ConfigFileParser->parse( configFile.c_str() ); > > DOMDocument* xmlDoc = m_ConfigFileParser->getDocument(); > > DOMElement* elementRoot = xmlDoc->getDocumentElement(); > if( !elementRoot ) throw(std::runtime_error( "empty XML document" > )); > DOMNodeList* children = elementRoot->getChildNodes(); > > cout << "Total Locates Proteins : " << children->getLength() << > endl; > > for( XMLSize_t xx = 0; xx < children->getLength(); ++xx ) > { > DOMNode* currentNode = children->item(xx); > if( currentNode->getNodeType() == DOMNode::ELEMENT_NODE ) > { > // Found node which is an Element. Re-cast node as element > DOMElement* currentElement > = dynamic_cast< xercesc::DOMElement* >( > currentNode ); > //cout << currentElement << endl; > if( > XMLString::equals(currentElement->getTagName(),TAG_locateProtein)) > { > // Already tested node as type element and of name > "ApplicationSettings". > // Read attributes of element "ApplicationSettings". > const XMLCh* xmlch_locateID > = currentElement->getAttribute(ATTR_locateID); > m_locateID = XMLString::transcode(xmlch_locateID); > > const XMLCh* xmlch_locateUniprotID > = currentElement->getAttribute(ATTR_locateUniprotID); > m_locateUniprotID = XMLString::transcode(xmlch_locateUniprotID); > > const XMLCh* xmlch_locateRefseqID > = currentElement->getAttribute(ATTR_locateRefseqID); > m_locateRefseqID = XMLString::transcode(xmlch_locateRefseqID); > > cout << "Locate ID:" > << m_locateID > << "|UniprotID:" > << m_locateUniprotID > << "|RefseqID:" > << m_locateRefseqID > << endl; > > DOMNode* currentChild=currentNode->getFirstChild(); > cout << currentChild->getTextContent() << endl; > cout << > XMLString::transcode(currentNode->getFirstChild()->getNodeName()) > << endl; > } > } > } > > > > -- > Mr. Gaurav Kumar > PhD Student (Bioinformatics/Computational Biology) > > -- Mr. Gaurav Kumar PhD Student (Bioinformatics/Computational Biology)
